Nouns

(n)liberal, liberalist, progressivea person who favors a political philosophy of progress and reform and the protection of civil liberties
(n)liberala person who favors an economic theory of laissez-faire and self-regulating markets

Adjectives

(s)broad, large-minded, liberal, tolerantshowing or characterized by broad-mindedness“a broad political stance”, “generous and broad sympathies”, “a liberal newspaper”, “tolerant of his opponent's opinions”
(s)liberalhaving political or social views favoring reform and progress
(a)liberaltolerant of change; not bound by authoritarianism, orthodoxy, or tradition
(s)big, bighearted, bounteous, bountiful, freehanded, handsome, giving, liberal, openhandedgiven or giving freely“was a big tipper”, “the bounteous goodness of God”, “bountiful compliments”, “a freehanded host”, “a handsome allowance”, “Saturday's child is loving and giving”, “a liberal backer of the arts”, “a munificent gift”, “her fond and openhanded grandfather”
(s)free, loose, liberalnot literal“a loose interpretation of what she had been told”, “a free translation of the poem”